Insulated support for electrical conductors



L; STEINBERGER.

INSU'LATED SUPPORT FOR ELECTRICAL CONDUCTORS. APPLICATION FILED SEPT. 20. I919.

1,342,31 1 Patented June 1, 1920.

1/271. 7U I F50 l/l INVENTOI? PATENT OFFICE.

LOUIS STEINBEBGER, OF BROOKLYN, NEW YORK.

rusuna'rnn surron'r Original application filed February Specification of Letters Patent.

ron ELECTRICAL COIIDUCTORS.

Patented June 1, 1920.

1, 1819, Serial No. 274,416. Divided and this application filed September 20, 1919. Serial No. 825,161.

To all whom it may concern: Be it known that I, LOUIS S'rnmnnnonu, a citizen of the United States, and a resident of the borough of Brooklyn, county of Kings, State of ew York, have invented certain new and useful Improvements in Insulated Supports for Electrical Conductors, of which the following is a specification. I

This application includes matter divided out of my rior application Serial No. 27%416, filed ebruary 1, 1919.

My invention relates to an improved insulated support for electrical conductors for high frequency and high tension currents. It is especially adapted for use in radio apparatus wherein the contact or slider is mounted to have a mechanical and consequently an electrical connection with the conductor. coil. I

One of. the objects of my invention is to provide an elongated body of insulating material having a helical coil, the metallic strip forming the coil .being secured at intervals to a surface of the elongated body, the remainder of the metallic strip being exposed.

Another object of the invention is to pro videan elongated body of insulating material having a conducting strip in the form of a helical coil secured at intervals of the elongated body,

to a side provided between the helioal coil and the 3 side of the elongated insulating body and between the securing points of the coil to the body.

Another object of my invention is to pro- 'vide an elongated body of insulating material having a metallic helical coil molded at intervals to a side of the elongated body, the remainder of the metallic strip being exposed.

Another object of the invention is to provide an elongated body of insulating material having a metallic helical coil molded at intervals to a side of the elongated body, exposed spaces being provided between the helical coil and the side of the elongated insulating body and between the securing points of the coil to the body.-

Another object of the invention is to provide a hollow elongated body of insulating material with a strip of metal in the shape I of a helical coil, the said strip of metal beexposed spaces being.

tact with the slider, as well known in this Another object of the invention is to provide a hollow elongated body of insulating material, the inner surface of which is so shaped as to have a plurality of fiat sides situated in angular positions with respect to each other in combination with a strip of metal having the shape of a helical coil, said strip being partially embedded into the insulating material at intervals substantially at the center of the above specified fiat sides, ventilating openings being formed between the1 fiat sides and the inner edge of the metal 001 Other objects will appear from thesubjoined specification and claims.

Referring to the drawings,

Figure 1 is a view partly. in vertical section and partly in side elevation of a structure embodying one form of'my invention.

Fig. 2 is a section on line 22 of Fig. 1.

Fig. 3is a similar section as that shown in Fig. 2, the body of insulating material having a different outward form. from that shown in Fig. 2.

Figs. 4 and 5 show fragmentary portions of the metal strip forming the coil.

The insulating material from which the body is formed may be any suitable material for that purpose but it is preferredto use the insulating material which is well known cross section of the insulating body will be either triangular, rectangular. hexagonal, octagonal and so forth, or the flat surfaces constituting the side of the body will be either five, seven,- nine, and so forth, in num-' her. all as will be clearly understood.

As shown in Fig. 3, the outer surface of the hollow body of insulating material may be cylindrical but as above stated when the structure is as shown in Figs. 1 and 2 the flat surfaces constituting the inner wall of the body will equal in number the fiat surfaces constituting the outer wall;

I have chosen to illustrate in the drawing an elongated body rovided With six flat sun faces constituting res1')ectively the outer wall and the inner wall of the hollow body or the inner wall of the body alone. and which in horizontal cross-section is hexagonal in shape. This is deemed suilicicnt to clearly disclose my invention without multiplying the sheets of the drawings.

Referring to the drawings, l is a body of insulating material, elongated in shape. and

which is hollow throughout the central longitudinal portion thereof as at 11. 'lhe metallic strip 12 preferably of copper constituting the electrical conductor is coiled in the form of a. helix, and one edge thereof is provided at intervals with either a hole or holes 20, as shown in Fig. at, or with roughened portions 21 at intervals as shown in Fig. 5, so as to form anchoring means for the strip to the body of insulating material when the metallic helical coil is molded or embedded to the surface of the body thereof. The other portion of the strip is exposed and extends radially toward the axis of the body of insulating material, as clearly shown in the drawings.

In Figs. 1 and 2 is shown a hollow elongated body of insulating material. the outer surface of which is .l-iexat'onal in cross section formed by opposing 'l'lat sides or surface. arranged at an angle to each other so that these sides or surfaces meet each other in a longitudinal line. and in Fig. 3 is shown a hollow elongated body of insulating material, the outer surface of which is cylindrical.

As clearly shown in the drawings the outer edge of the helical metallic coil is molded or embedded to the central portions of the flat sides forming the inner wall of the longitudinal opening 11 which extends throughout the insulator body. Ventilating Spaces 16 are formed in this structure between the outer edge of the strip and the corners of the walls forming the inner surface of the central opening. As shown in Figs. 4 and 5. and as also indicated in the 'other figures, holes 20 or roughened spaces 21 are formed on the metallic strips on the inner edge or on the outer edge thereof, as

the case may be, to function as anchorii'ig means for the coiled strip or conductor to the body of the insulator. Of course, it is immaterial whether the anchoring is accomplished by Illflllh of perforations or holes 20, as shown in Fig. 4 or by the roughened spaces shown in Fig. l.

I also provide ventilating holes 30 in the sides of the hollow insulating body. the said holes being situated substantially midway of each flat surface of the side. and also midway between the portions of the metal strip constituting the entire coil.

As will be seen. the structure descrii'ied may be so mounted that in use the contact or slider can revolve and travel up and down along the helix, the body of the insulator remaining stationary. or else the contact or slider can remain fixed and the elongated insulating body may rotate. so that the metallic strip will remain always in contact with theslider. In this latter case the elongated body of insulating n'iaterial as it retates will move in the direction of its axis.

.s stated above, the insulating body may be made of any approved insulating ma terial. and when made of. insulating material which can be molded into the form desired. the helical coil is secured or embedded into the insulating material during the process of molding. iVhen the insulating body is made of fireproof material, such as porcelain. the helical coil may be secured to the insulating body by means of cement or other securing material, all as well understood in the art.

As changes of construction could be made within the scope of my invention, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illust 'ative and not in a limiting sense.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. As an article of manufacture. a helical metallic coil secured at intervals along its length to the inner surface of a hollow elongated body of insulating material, a portion of the coil being exposed to form an electrical contact.

2. As an article of manufacture, a helical metallic coil secured at intervals along its length to the inner surface of a hollow elongated body of insulating material forming ventilating spaces therebetween, a .portion of the coil being exposed to form an electrical contact.

As an article of manufacture. an elongated hollow insulating body, the horizontal cross section of which has a plurality of angularly disposed sides in combination with a helical conducting coil embedded to the elongated body at intervals along the central line of the sides at substantially equal distances from the respective adjacent an gles.

4. .\s an article of manufacture, a hollow elongated body of insulating material provided with flat sides extending longitudinally thereof to form the inner wall. each side being angularly situated with respect to its adjacent side in combination with a helical conducting coil molded thereto at points uniformly distant from the respective angles forming ventilating spaces between the coil and the sides of the angles. the remaining portion of the coil being exposed to form an electrical contact.

5. In a device of the kind described, an elongated hollow body of insulating material, provided with flat sides extending longitudinally thereof to. form its inner wall, each flat side being angularly situated with respect to its adjacent flat side,in combination with an electrical conducting coil embedded therein at points uniformly distaut apart and uniformly disposed with respect to the aforesaid angles, the remaining portion of the coil being exposed to form an electrical contact, and providing vent-ilating spaces between the coil and the angles of the adjacent flat sides, the body having ventilatingholes extending through the insulating material, said holes being arranged in angular relationship to each other and situated between coil throughout the length of the insulator I "body.

6. In a device of the kind described, an elongated insulating body, the horizontal cross section of which has a plurality'of angularly disposed sides, in combination with a helical conducting coil secured to the elongated body throughout its length at points intermediate of the adjacent angles.

7 In a device of the kind described, an elongated insulating body, the horizontal cross section of which has a plurality of angularly disposed sides, in combination with a helical conducting coil molded to the elongated body throughout its length at points intermediate of the adjacent angles.

8. In a device of the kind described, an elongated body of insulating material hexhexagon, forming the turns of the helical body at points equidistant from each angle of the hexagon, the remaining portions of the 001i being exposed.

9. In a device of the kind described, an

elongated body of insulating material hexagonal in cross section, in combination with a, helical conducting coil molded throughout its length to the wall ofthe insulating body.

at points equidistant from each angle of the between, the remaining being exposed.

10. In a device of the 'kind described,'-an elongated body of insulating material hexag onal in cross section, in combination with a helical conducting coil molded throughout portions of the coil its length to the wall of the insulating body at points equidistant from each angle of the hexagon, forming ventilating spaces therebetween, the remaining portions of the coil being exposed, the said body having ve'nti lating holes or conduits therethrough ar-' ranged midway between the turn of the coil throughout the length of the body.

In witness whereof, I have hereunto set my hand at the borough of Manhattan, city and State of New York, this 18 day of September, 1919.

LOUIS STEINBERGER.

In presence of- ISABEL R. FLETCHER ventilating spaces there- 

